So for question 7 part A the picture will be a triangle similar to the the one that shows the umbrella's height. But the base will be 40 and the height will be 130.
for part B the angle of depression can be found using the trigonometric function of tangent.
tan x = 40/130
tan^-1 (tan x) = tan^-1 (40/30)
x = 17 degrees
I hope i am right
Factor. 2xy+5x−12y−30
(2y+5) (x-6)
Angle (6) + Angle (7) = 180
Angle (6) + 57 = 180
Angle (6) = 180 - 57
Angle (6) = 123
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Angle (6) = Angle (8)
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Therefore:
Angle (8) = 123 degrees
It is subordinate because who is nine years old can not stand by itself!
Hope it helps :)
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For the first the correct answer is C
the second
the perimiter of the triangle is equal the sum of the sides
x +x-1+x-2= 12
3x = 12 +3
x= 15/3 = 5
